That, which cannot be illuminated by words,
which illuminates the words,
realize that That alone is the All-pervading;
Not this, that is worshipped here!

Notes:

1. abhyut - illuminate; brahma - All-pervading (God).

2. tad Eva brahma tvaM viddhi
There are three things. One all intelligent and
independent beyond limitations; Second unintelligent;
Third dependent intelligent. These are respectively
pati, pasha and pashu or brahman, world and souls.

The all intelligent and independent God does not require
the help of any instruments. The dependent intelligent
souls however need the instruments like Vak - speech, eyes
etc to know. While God is the cause that gave us, the souls
the instruments and illuminate us through them, these
limited instruments are insufficient for us to apply on God
to get a complete picture.

3. na idaM yat idam upAsatE
It is not what people worship here!
We worship the God in the nature, in the ritual fire,
in the images/icons/forms. They are all representation of
God and help us associate with the Supreme All-pervading spirit.
However we need to realize that these symbols themselves are
not complete God Itself and God is All-pervading helping us
in every action we do.

One, who worships the God in the symbols with this knowledge,
is illuminated. There have been ignorant people since olden times
to recent times, who fail to realize the concept of the All-pervading God
and Its symbolic worship. They either blindly worship or bark ignorantly
about the symbolic worship.